diff --git a/pkg/testutil/alert_custom_validations.go b/pkg/testutil/alert_custom_validations.go
new file mode 100644
index 0000000..073eced
--- /dev/null
+++ b/pkg/testutil/alert_custom_validations.go
@@ -0,0 +1,72 @@
+package testutil
+
+import promv1 "github.com/prometheus-operator/prometheus-operator/pkg/apis/monitoring/v1"
+
+func ValidateAlertNameLength(alert *promv1.Rule) []Problem {
+	var result []Problem
+
+	if len(alert.Alert) > 50 {
+		result = append(result, Problem{
+			ResourceName: alert.Alert,
+			Description:  "alert name exceeds 50 characters",
+		})
+	}
+
+	return result
+}
+
+func ValidateAlertRunbookURLAnnotation(alert *promv1.Rule) []Problem {
+	var result []Problem
+
+	runbookURL := alert.Annotations["runbook_url"]
+	if runbookURL == "" {
+		result = append(result, Problem{
+			ResourceName: alert.Alert,
+			Description:  "alert must have a runbook_url annotation",
+		})
+	}
+
+	return result
+}
+
+func ValidateHealthImpactLabel(alert *promv1.Rule) []Problem {
+	var result []Problem
+
+	healthImpact := alert.Labels["operator_health_impact"]
+	if healthImpact == "" {
+		result = append(result, Problem{
+			ResourceName: alert.Alert,
+			Description:  "alert must have a operator_health_impact label",
+		})
+	}
+
+	return result
+}
+
+func ValidateAlertPartOfLabel(alert *promv1.Rule) []Problem {
+	var result []Problem
+
+	partOf := alert.Labels["kubernetes_operator_part_of"]
+	if partOf == "" {
+		result = append(result, Problem{
+			ResourceName: alert.Alert,
+			Description:  "alert must have a kubernetes_operator_part_of label",
+		})
+	}
+
+	return result
+}
+
+func ValidateAlertComponentLabel(alert *promv1.Rule) []Problem {
+	var result []Problem
+
+	partOf := alert.Labels["kubernetes_operator_component"]
+	if partOf == "" {
+		result = append(result, Problem{
+			ResourceName: alert.Alert,
+			Description:  "alert must have a kubernetes_operator_component label",
+		})
+	}
+
+	return result
+}
diff --git a/pkg/testutil/alert_validation_test.go b/pkg/testutil/alert_validation_test.go
index e451c06..a5b1f16 100644
--- a/pkg/testutil/alert_validation_test.go
+++ b/pkg/testutil/alert_validation_test.go
@@ -16,7 +16,7 @@ var _ = Describe("Validators", func() {
 		linter = New()
 	})
 
-	Context("Alert Validation", func() {
+	Context("Default alert Validations", func() {
 		It("should validate alert with valid input", func() {
 			alert := &promv1.Rule{
 				Alert: "ExampleAlert",
@@ -116,4 +116,136 @@ var _ = Describe("Validators", func() {
 			Expect(problems[0].Description).To(ContainSubstring("alert must have a description annotation"))
 		})
 	})
+
+	Context("Custom alert Validations", func() {
+		It("should not return error if all custom validations were added and all exist", func() {
+			alert := &promv1.Rule{
+				Alert: "ExampleAlert",
+				Expr:  intstr.FromString("sum(rate(http_requests_total[5m]))"),
+				Labels: map[string]string{
+					"severity":                      "critical",
+					"operator_health_impact":        "example_health_impact",
+					"kubernetes_operator_part_of":   "example_part_of",
+					"kubernetes_operator_component": "example_component",
+				},
+				Annotations: map[string]string{
+					"summary":     "Example summary",
+					"description": "Example description",
+					"runbook_url": "example_runbook_url",
+				},
+			}
+			linter.AddCustomAlertValidations(ValidateAlertNameLength, ValidateAlertRunbookURLAnnotation,
+				ValidateHealthImpactLabel, ValidateAlertPartOfLabel, ValidateAlertComponentLabel)
+			problems := linter.LintAlert(alert)
+			Expect(problems).To(BeEmpty())
+		})
+
+		It("should return error if alert name length custom validation was added and alert name is too long", func() {
+			alert := &promv1.Rule{
+				Alert: "ExampleAlertWithVeryLongNameExtendedToMeetFiftyOneLength",
+				Expr:  intstr.FromString("sum(rate(http_requests_total[5m]))"),
+				Labels: map[string]string{
+					"severity": "critical",
+				},
+				Annotations: map[string]string{
+					"summary":     "Example summary",
+					"description": "Example description",
+				},
+			}
+			linter.AddCustomAlertValidations(ValidateAlertNameLength)
+			problems := linter.LintAlert(alert)
+			Expect(problems).To(HaveLen(1))
+			Expect(problems[0].Description).To(ContainSubstring("alert name exceeds 50 characters"))
+		})
+
+		It("should return error if runbook_url custom validation was added and is missing", func() {
+			alert := &promv1.Rule{
+				Alert: "ExampleAlert",
+				Expr:  intstr.FromString("sum(rate(http_requests_total[5m]))"),
+				Labels: map[string]string{
+					"severity": "critical",
+				},
+				Annotations: map[string]string{
+					"summary":     "Example summary",
+					"description": "Example description",
+				},
+			}
+			linter.AddCustomAlertValidations(ValidateAlertRunbookURLAnnotation)
+			problems := linter.LintAlert(alert)
+			Expect(problems).To(HaveLen(1))
+			Expect(problems[0].Description).To(ContainSubstring("alert must have a runbook_url annotation"))
+		})
+
+		It("should return error if kubernetes_operator_part_of custom validation was added and is missing", func() {
+			alert := &promv1.Rule{
+				Alert: "ExampleAlert",
+				Expr:  intstr.FromString("sum(rate(http_requests_total[5m]))"),
+				Labels: map[string]string{
+					"severity": "critical",
+				},
+				Annotations: map[string]string{
+					"summary":     "Example summary",
+					"description": "Example description",
+				},
+			}
+			linter.AddCustomAlertValidations(ValidateAlertPartOfLabel)
+			problems := linter.LintAlert(alert)
+			Expect(problems).To(HaveLen(1))
+			Expect(problems[0].Description).To(ContainSubstring("alert must have a kubernetes_operator_part_of label"))
+		})
+
+		It("should return error if operator_health_impact custom validation was added and is missing", func() {
+			alert := &promv1.Rule{
+				Alert: "ExampleAlert",
+				Expr:  intstr.FromString("sum(rate(http_requests_total[5m]))"),
+				Labels: map[string]string{
+					"severity": "critical",
+				},
+				Annotations: map[string]string{
+					"summary":     "Example summary",
+					"description": "Example description",
+				},
+			}
+			linter.AddCustomAlertValidations(ValidateHealthImpactLabel)
+			problems := linter.LintAlert(alert)
+			Expect(problems).To(HaveLen(1))
+			Expect(problems[0].Description).To(ContainSubstring("alert must have a operator_health_impact label"))
+		})
+
+		It("should return error if kubernetes_operator_component custom validation was added and is missing", func() {
+			alert := &promv1.Rule{
+				Alert: "ExampleAlert",
+				Expr:  intstr.FromString("sum(rate(http_requests_total[5m]))"),
+				Labels: map[string]string{
+					"severity": "critical",
+				},
+				Annotations: map[string]string{
+					"summary":     "Example summary",
+					"description": "Example description",
+				},
+			}
+			linter.AddCustomAlertValidations(ValidateAlertComponentLabel)
+			problems := linter.LintAlert(alert)
+			Expect(problems).To(HaveLen(1))
+			Expect(problems[0].Description).To(ContainSubstring("alert must have a kubernetes_operator_component label"))
+		})
+
+		It("should return error if kubernetes_operator_component custom validation was added and is missing", func() {
+			alert := &promv1.Rule{
+				Alert: "ExampleAlert",
+				Expr:  intstr.FromString("sum(rate(http_requests_total[5m]))"),
+				Labels: map[string]string{
+					"severity": "critical",
+				},
+				Annotations: map[string]string{
+					"summary":     "Example summary",
+					"description": "Example description",
+				},
+			}
+			linter.AddCustomAlertValidations(ValidateAlertComponentLabel)
+			problems := linter.LintAlert(alert)
+			Expect(problems).To(HaveLen(1))
+			Expect(problems[0].Description).To(ContainSubstring("alert must have a kubernetes_operator_component label"))
+		})
+	})
 })